I am reliably told that in the Chilterns you can wander around yelling and Red Kites will drop out of the sky like so many chickens looking to be fed. So your proposal, if carried out in the correct area, is a good one.

I was really so lucky, and I felt it at the time! I couldn't believe I was the only one taking pictures of him. Even if no one else had spotted his flapping, surely someone was curious about the woman repeatedly circling this tree and taking pictures...